Organization and Summary of Significant Accounting Policies (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 27.6
Deferred rent and lease incentives	10.1
Operating lease, cost	$ 1.5
Operating lease, weighted average remaining lease term	7 years 2 months 6 days
Operating lease, weighted average discount rate, percent	7.00%
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	$ 37.5
Operating lease, right-of-use asset	$ 37.5